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| View Original: | Ground loop solution - resistor.svg (998x617) | |||
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| Keywords: Ground loop solution - resistor.svg ground loop is an inadvertent electrical circuit or loop created by the ground wiring of electrical equipment Ground loops are a major cause of hum and interference in audio video and computer equipment because circulating currents induced by stray magnetic fields from nearby 50/60 Hz equipment can cause AC voltage dropped across signal grounds In this diagram two AC powered electronic components C1 and C2 are connected by a shielded signal cable S The ground shield of S along with the ground wire third wire P in the components' power cord and the building's utility ground wiring G form a ground loop <br /> Inserting a 10Ω resistor <font color red >red</font> in the ground shield conductor of the cable S is enough to prevent the ground loop current from flowing This solution is better than simply creating a break in the cable's ground shield because if one of the components doesn't have a ground wire third wire P in its power cable the resistance is low enough that the component will still be kept effectively at signal ground potential through S This prevents it from being totally ungrounded floating which would cause loud hum or interference Information and circuit from Larry Robinson http //midimagic sgc-hosting com/gndloop htm About Ground Loops MidiMagic website 2014-01-20 13 41 29 own Chetvorno cc-zero Uploaded with UploadWizard Ground loops | ||||
